EP 0813042 B1 20071107 - Ultrasonic vortex flowmeter having remote signal processing
Title (en)
Ultrasonic vortex flowmeter having remote signal processing
Title (de)
Ultraschalldurchflussmesser mit entferntliegender Signalverarbeitung
Title (fr)
Débitmètre à induction de vortex ultrasonore ayant traitement de signal à distance
Publication
Application
Priority
- US 66203796 A 19960612
- US 78471297 A 19970116
Abstract (en)
[origin: EP0813042A1] An improved ultrasonic vortex fluid flowmeter (10) includes a sensor housing (12) having a slip-on yoke portion which removably mates with a bluff body conduit connector (14) permanently installed in a fluid conduit to be monitored. An ultrasonic transmitter (22) and receiver (24) are respectively positioned within the legs of the yoke so as pass an ultrasonic wave through vortices (42) shed by the fluid as it flows by a bluff body (36). The slip-on yoke eliminates both the need to shut down fluid flow during meter servicing, and the potential for external contaminants entering the fluid. Control and processing circuitry (100) is disposed within a remotely located circuit housing (38) to improve overall isolation of the sensor from the fluid conduit being monitored. An Exclusive Or gate (44) is used in combination with an optimal phase range detecting means (108) for triggering a 90 degree phase shift whenever the phase difference between the transmitted wave and the received wave approaches 0 or 180 degrees. <IMAGE>
IPC 8 full level
CPC (source: EP)
G01F 1/3282 (2022.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0813042 A1 19971217; EP 0813042 B1 20071107; AT E377745 T1 20071115; CN 1138130 C 20040211; CN 1180162 A 19980429; ES 2296300 T3 20080416; JP H1078338 A 19980324
DOCDB simple family (application)
EP 97109121 A 19970605; AT 97109121 T 19970605; CN 97114936 A 19970611; ES 97109121 T 19970605; JP 16805197 A 19970610